What I learned comparing the Costco Bosch 800 before buying

I did the same spec sheet comparison last spring when I was picking between the 800 and the 500 series, and honestly the rack comparison was the only thing that settled it for me. I wanted the adjustable tines on the lower rack because we run a lot of wierd-shaped pots, and that alone made the decision. The wash performance between the two lines felt identical in day-to-day use.

One thing I'd add from my own install: measure your door clearance before you order. My island overhang meant the door only opened about 85 degrees, and the top rack wasn't as easy to load as the showroom display made it look. Had to trim a filler strip to get full swing.

On the warranty angle, I can confirm the Costco route is real. Our pump started making a grinding noise about fourteen months in, and the claim went thru Costco's service desk rather than dealing with Bosch directly. Had a tech out in under two weeks and no arguments about coverage. My neighbor's dealer-bought unit had a similar issue and he spent half an hour on hold with a third-party administrator. So if the price gap is small, I'd say the return policy and service path are where Costco actualy earns the difference.

Our dishwasher sits right off the living room so noise was the thing I fixated on. I grabbed a free sound meter app and ran my old machine, then the floor models at the appliance store, standing the same distance each time. Funny thing was every floor model read louder than the specs suggested, which makes sense in a bare showroom with nothing to soak up sound. Once mine was installed in actual cabinets it came in way under what I measured at the store. So if noise is on your list at all, don't judge by showroom listening. The app cost nothing and gave me more confidence than standing in an aisle ever did.

Gotta push back on the 'wash performance felt identical' bit. The 800 line runs CrystalDry and the 500 doesn't, and that's not a small thing. My old machine left plastic containers dripping no matter what I did, and this one actually gets them dry. That alone was the deciding factor for us, not the tines. If you hand-dry your stuff anyway then sure, they wash the same, but I bought a dishwasher so I wouldn't have to do that.